Back-pedaling brake.



Patantedlune l2; i900.

E, E. ZIEG LEB. BACK REDALING BRAKE.

(Application filed my 95, 1899 INVENTOR ,EQZI/w'd (No Model.)

WITNESSES":

UNITED STATES PATENT OFFICE.

EDWARD E. ZIEGLER, OF PHILADELPHIA, PENNSYLVANIA.

BACK-PEDALIN G BRAKE.

SPECIFICATION forming lan of Letters Patent No. 651,408, dated June 12, 1900.

Application filedMay 25,1899. Serial No. 718,165. (No model.)

.To all whom it may concern:

Be it known that I, EDWARD E. ZIEGLER, a citizen of the United States of America, and a resident of Philadelphia, in the county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Brakes for Bicycles and other Vehicles, of which the following is a specification.

My invention relates to improvements in pedal-brakes for bicycles andother vehicles; and the object is to provide the rear hub of a bicycle-wheel with a device by which sufficient frictional resistance will be produced to check the motion of the machine by reversing the motion of the sprocket wheel through the medium of the pedals and driving-chain or other intermediate gearing.

My invention will be more fully understood by referring to the accompanying drawings, in which- Figure 1 illustrates a perspective view of the rear hub and sprocket-wheel of a bicycle in which are located the devices forming the subject-matter of my invention. Fig. 2 represents a side elevation of the hub with the sprocket-wheel and parts adjacent in section. Fig. 3 shows a perspective view of a portion of the hub and sprocket-wheel, with the rollers adapted to the inclines on the hub of the sprocket-wheel. Fig. 4 illustrates a perspective View of the cup whichincloses the inclines of the sprocket-wheel and forms an outer bearing for the rollers, and Fig. 5 represents a perspective view of a portion of the hub which is provided with circumferential inclines adapted to the balls which engage the sprocket-wheel and turn the hub when the bicycle is being driven forward.

Referring to the letters of the drawings, A represents the hub of the driving-wheel, and B the fixed shaft, upon which the hub is rotated. These parts are of the usual construc- C and forms an outer bearing for the balls (1,

and when driven in the direction of the arrow shown in Fig. 3 the sprocket-Wheel causes the balls to travel up the inclines c and creates a frictional connection between the ring 0 and sprocket-wheel D when the machine is being driven forward; but if the sprocketwheel is held stationary and the hub revolves in the direction of the arrow the balls will be released from the sprocket-wheel and the hub will be free and may revolve independently. On the outer end of the sprocket wheel D is a hub D, in which are formed a number of inclines D made to receive rollers e, which are held in position and have an outer bearing in a cup E, which fits over the hub The cupE is secured to the shaftB and has an inner ring E, which serves, in conjunction with the outer edge of the cup, to form a race or guide way for the rollers c.

When the machine is being driven forward and the sprocket-wheel is revolving in the direction of the arrow shown in Fig. 3, the rollers 6 will freely revolve between-the inclines of the sprocket-wheel and the race formed in the cup E; but if the sprocket-wheel is moved in an opposite direction the rollers will move up the inclines and wedge themselves between the same and the cup, thus causing the sprocket-wheel to bear hard against the balls d, which being interposed between the sprocket-wheel and the end of the hub A cause sufficient friction'to check the motion of the hub.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. A device of the character specified, comprising a wheel-hub provided at one end with circumferential inclines, balls adapted to said inclines, a sprocket-wheel forming on one side a bearing for said balls and having a hub formed upon the opposite side provided with oppositely-arranged inclines, a cup inclosing the inclined portion of the hub and rollers interposed between the cup and hub and adapted to said inclines.

2. A device of the character specified comprising in combination with a wheel and hub thereof a sprocket -wheel or other driving mechanism in contact with the hub, ratchetteeth formed on said hub, balls adapted to the incline between the ratchet-teeth and interposed between the hub and sprocket-wheel, a supporting-shaft, a cup ordisk mounted thereon, oppositely-arranged ratchet-teeth on the sprocket-wheel, rollers between the cupcup mounted upon the fixed shaft having in-' ner and outer rings inclosing said inclines, and rollers interposed between the cup and sprocket-wheel substantially as shown and described.

4. A pedal-brake for bicycles and other vehicles comprising a ti xed shaft, a cup threaded thereon, a sp1'oeket-\vheel, provided with inclined sockets, rollers arranged between the cup and sprocket-wheel, a wheel-hub provided wit [1 oppositely-arranged inclined sockets, balls between the same and the sprocketwhecl, the ari-angeiuentbeiug such as to cause frictional resistance between the fixed and movable parts of the device when the sprocketwhecl is moved in a reverse direction.

5. A pedal-brake for bicycles and other vehicles comprising a wheel having a hub provided with a number of inclined surfaces forming seats for the reception of balls, balls of greater diameter than the width of the seats adapted thereto, a sprocket-wheel mounted upon said hub provided with oppositely-arranged inclines, balls between the hub and sprocket-wheel, a fixed central shaft, supporting the hub, a cup secured to said shaft against turning and rollers between the cup and the inclines upon the end of the sprocket Wheel.

(3.A pedal-brake comprising in combination with a driving-wheel and hub, the latter being provided with a series of inclines forming seats, balls in said seats of substantially larger diameter than the width of the seats, a sprocket-wheel countersunk so as to receive the hub and form an outer seat for the balls, a hub D, on the sprocket-wheel having oppositely-arranged inclines, D a fixed cup, E, and rollers, c, between the sprocket-wheel and cup.

7. A pedal-brake comprising a sprocketwheel having the inclines D the cup E, and rollers 6, between the cup and sprocket-wheel, a wheel-hub having the inclines c, and the balls (Z, adapted to said inclines.

Signed by me at Philadelphia, Pennsylvania, this 17th day of May, 1899.

EDW. E. ZIEGLER.

\Vitnesses:

ANDREW V. GRoUrE, DAVID S. WILLIAMS. 

